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31 December 2022 Non-Hermitian optics in a single nonlinear microcavity
Wenjie Wan
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Proceedings Volume PC12323, Quantum and Nonlinear Optics IX; PC123230I (2022) https://doi.org/10.1117/12.2649523
Event: SPIE/COS Photonics Asia, 2022, Online Only
Abstract
Optical microcavities are inherently non-Hermitian in nature, offering a fertile ground to test recent emerging development in non-Hermitian physics. Among them, representative examples include coherent perfect absorption (CPA)/critical coupling, electromagnetically induced transparency (EIT), parity-time symmetric coupled resonators, exceptional points (EP). In this talk, we shall discuss our group’s efforts in non-Hermitian optics in a single microcavity by extending an additional dimension such as frequency through internal nonlinear optical processes. Within a single whispering-gallery-mode type microcavity, we show nonlinearity can alter the total transmission of a CPA, examining such a critical coupling mechanism in the nonlinear regime. Similarly, we demonstrate a new mechanism of optically induced transparency in a micro-cavity by introducing a four-wave mixing gain to nonlinearly couple two separated resonances of the micro-cavity in an ambient environment.
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Wenjie Wan "Non-Hermitian optics in a single nonlinear microcavity", Proc. SPIE PC12323, Quantum and Nonlinear Optics IX, PC123230I (31 December 2022); https://doi.org/10.1117/12.2649523
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KEYWORDS
Optical microcavities
Nonlinear optics
Singular optics
Transparency
Absorption
Four wave mixing
Physics
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